|
Equity - Shareholders' Equity (Detail)
|
12 Months Ended | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Dec. 31, 2013
|
Dec. 31, 2012
|
Dec. 31, 2013
Common Stock [Member]
|
Dec. 31, 2012
Common Stock [Member]
|
Dec. 31, 2011
Common Stock [Member]
|
Dec. 31, 2010
Common Stock [Member]
|
Dec. 31, 2013
Treasury Stock [Member]
|
Dec. 31, 2012
Treasury Stock [Member]
|
Dec. 31, 2011
Treasury Stock [Member]
|
||||||||
| Movement in Common Stock and Treasury Stock [Roll Forward] | ||||||||||||||||
| Balance January 1 | 3,577,103,522 | 3,577,103,522 | 3,577,000,000 | 3,577,000,000 | 3,577,000,000 | 3,577,000,000 | 550,000,000 | 536,000,000 | 495,000,000 | |||||||
| Purchases of treasury stock | 139,000,000 | [1] | 62,000,000 | [1] | 58,000,000 | [1] | ||||||||||
| Issuances | (39,000,000) | [2] | (48,000,000) | [2] | (17,000,000) | [2] | ||||||||||
| Balance December 31 | 3,577,103,522 | 3,577,103,522 | 3,577,000,000 | 3,577,000,000 | 3,577,000,000 | 3,577,000,000 | 650,000,000 | 550,000,000 | 536,000,000 | |||||||
|
||||||||||||||||