Retirement Plans (Schedule of Valuation of the Company's Pension Plan Assets by Pricing Categories) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Fair value of plan assets	$ 281	$ 254
(Level 1)
Fair value of plan assets	249	220
(Level 2)
Fair value of plan assets	10	11
(Level 3)
Fair value of plan assets	22	23	17
Cash and cash equivalents
Fair value of plan assets	10	5
Cash and cash equivalents | (Level 1)
Fair value of plan assets	10	5
Equity securities
Fair value of plan assets	94	100
Equity securities | (Level 1)
Fair value of plan assets	94	100
Corporate debt securities
Fair value of plan assets	128	93
Corporate debt securities | (Level 1)
Fair value of plan assets	127	93
Corporate debt securities | (Level 2)
Fair value of plan assets	2
Other
Fair value of plan assets	49	56
Other | (Level 1)
Fair value of plan assets	18	22
Other | (Level 2)
Fair value of plan assets	8	11
Other | (Level 3)
Fair value of plan assets	$ 22	$ 23