Retirement Plans (Schedule of Company's Defined Benefit Pension Plans) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013
Projected benefit obligations at beginning of year	$ 447
Service cost	(30)	(21)	(20)
Interest cost	(13)	(13)	(13)
Actuarial (gains) losses	28	(87)	(10)
Projected benefit obligations at end of year	456	447
Accumulated benefit obligations at end of year	427	417
Fair value of plan assets at beginning of year	254			281
Change in projected benefit obligations [Member]
Projected benefit obligations at beginning of year	447	316
Service cost	30	21
Interest cost	13	13
Foreign exchange impact	2	2
Employee contributions	6	6
Actuarial (gains) losses	(29)	110
Plan amendments	(1)	(1)
Benefits paid	(12)	(20)
Projected benefit obligations at end of year	456	447
Change in plan assets [Member]
Foreign exchange impact	1	2
Employee contributions	6	6
Benefits paid	(11)	(18)
Fair value of plan assets at beginning of year	254	210		281
Actual return	11	33
Employer contributions	$ 20	$ 21