Business Segments (Schedule of Revenue and Long-Lived Assets, By Geographical Area) (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 12 Months Ended | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2014
|
Sep. 30, 2014
|
Jun. 30, 2014
|
Mar. 31, 2014
|
Dec. 31, 2013
|
Sep. 30, 2013
|
Jun. 30, 2013
|
Mar. 31, 2013
|
Dec. 31, 2014
|
Dec. 31, 2013
|
Dec. 31, 2012
|
|
Revenues from External Customers and Long-Lived Assets [Line Items] | |||||||||||
Consolidated revenue | $ 5,559 | $ 6,395 | $ 5,708 | $ 6,263 | $ 5,610 | $ 6,217 | $ 5,393 | $ 5,536 | $ 23,925 | $ 22,756 | $ 17,912 |
Consolidated long-lived assets | 83,167 | 81,362 | 83,167 | 81,362 | 81,611 | ||||||
U.S. [Member] | |||||||||||
Revenues from External Customers and Long-Lived Assets [Line Items] | |||||||||||
Consolidated revenue | 22,508 | 21,211 | 16,366 | ||||||||
Consolidated long-lived assets | 80,709 | 78,581 | 80,709 | 78,581 | 79,144 | ||||||
Latin America [Member] | |||||||||||
Revenues from External Customers and Long-Lived Assets [Line Items] | |||||||||||
Consolidated revenue | 1,417 | 1,545 | 1,546 | ||||||||
Consolidated long-lived assets | $ 2,458 | $ 2,781 | $ 2,458 | $ 2,781 | $ 2,467 |