Valuation and Qualifying Accounts (Valuation and Qualifying Account Activity) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Allowance For Doubtful Accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at January 1	$ 51		$ 45		$ 49
Charged to Earnings	14		8		7
Used	(8)		(4)		(4)
Adjustments	(1)	[1]	2	[1]	(7)	[1]
Balance at December 31	56		51		45
Allowance For Losses On Long-Term Receivables
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at January 1			10	[1],[2]	1
Charged to Earnings			0		10
Used			0		(1)
Adjustments			(10)	[1],[2]	0	[1]
Balance at December 31			0		10	[1],[2]
Inventory Reserves
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at January 1	163		170		157
Charged to Earnings	73		67		37
Used	(58)		(73)		(30)
Adjustments	0	[1]	(1)	[1]	6	[1]
Balance at December 31	178		163		170
Customer Reserves
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at January 1	144		125		117
Charged to Earnings	615		456		580
Used	(609)		(416)		(565)
Adjustments	(4)	[1]	(21)	[1]	(7)	[1]
Balance at December 31	$ 146		$ 144		$ 125

[1] Adjustments include translation adjustments

[2] During 2012, the adjustment of $10 million within Allowance for Losses on Long-term Receivables relates to a reclass from non-current to current.