Capital Stock (Narrative) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2014
Cash dividends declared, per share of common stock	$ 0.305	$ 0.2650
Stock Repurchased and Retired During Period, Shares	0	0
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 683