Employee Separation Actions (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
North America Segment [Member]
Restructuring Cost and Reserve [Line Items]
Pre-tax charges, employee separation actions		$ 7	$ 15
International Segment [Member]
Restructuring Cost and Reserve [Line Items]
Pre-tax charges, employee separation actions	8	18	21
Pre-tax charges, retirement plan benefits	$ 1	$ 3	$ 2

The charge against earnings in the period for known and estimated costs of termination benefits provided to current employees that are involuntarily terminated under a benefit arrangement associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding costs or losses pertaining to an entity newly acquired in a business combination or a discontinued operation as defined by generally accepted accounting principles and costs associated with one-time termination benefits.

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+ Details