Segment Information (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015 Segment	Mar. 31, 2014
Segment Reporting [Abstract]
Number of segments	6
Corporate Benefit Funding
Segment Reporting Information [Line Items]
Prior Period Reclassification Adjustment		$ 15
Prior Period Adjustment To Operating Earnings Tax Expense		(8)
Corporate & Other
Segment Reporting Information [Line Items]
Prior Period Reclassification Adjustment		26
Prior Period Adjustment To Operating Earnings Tax Expense		73
Retail
Segment Reporting Information [Line Items]
Prior Period Reclassification Adjustment		24
Prior Period Adjustment To Operating Earnings Tax Expense		(44)
Group, Voluntary & Worksite Benefits
Segment Reporting Information [Line Items]
Prior Period Reclassification Adjustment		2
Prior Period Adjustment To Operating Earnings Tax Expense		1
Latin America
Segment Reporting Information [Line Items]
Prior Period Reclassification Adjustment		25
Prior Period Adjustment To Operating Earnings Tax Expense		(16)
Asia
Segment Reporting Information [Line Items]
Prior Period Reclassification Adjustment		5
Prior Period Adjustment To Operating Earnings Tax Expense		1
Europe, Middle East And Africa Segment
Segment Reporting Information [Line Items]
Prior Period Reclassification Adjustment		17
Prior Period Adjustment To Operating Earnings Tax Expense		$ (7)