Segment Information - Schedule of Segment Reporting Information, by Segment (Parenthetical) (Detail) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | |
---|---|---|
Mar. 31, 2014
|
Mar. 31, 2013
|
|
Segment Reporting Information [Line Items] | ||
Interest expense included in the segment results | $ 103 | $ 98 |
Interest Income Excluded From Segment Information
|
||
Segment Reporting Information [Line Items] | ||
Interest income included in the segment results | 5 | 0 |
Interest Expense Excluded From Segment Information
|
||
Segment Reporting Information [Line Items] | ||
Interest expense included in the segment results | $ 6 | $ 5 |