Leases - Supplemental Cash Flow Information (Details) $ in Millions |
12 Months Ended |
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Dec. 31, 2019
USD ($)
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| Cash paid for amounts included in the measurement of lease liabilities: | |
| Operating cash flows from financing leases | $ 12 |
| Operating cash flows from operating leases | 275 |
| Financing cash flows from financing leases | 138 |
| Right-of-use assets obtained in exchange for lease obligations: | |
| Operating lease liabilities | 918 |
| Finance lease liabilities | $ 251 |
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- Definition Cash Paid For Amounts Included In The Measurement Of Lease Liabilities [Abstract] No definition available.
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- Definition Right-Of-Use Assets Obtained In Exchange For Lease Obligations [Abstract] No definition available.
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- Definition Amount of interest paid on finance lease liability. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of cash outflow for principal payment on finance lease. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of increase in right-of-use asset obtained in exchange for finance lease liability. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of increase in right-of-use asset obtained in exchange for operating lease liability. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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