Other Income and Expense (Other Expense) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Other Income and Expenses [Abstract]
Loss on disposal of assets	$ 51	$ 64	$ 66
Contract termination	7	0	0
Other	18	18	20
Total other expense	$ 76	$ 82	$ 86