Revenue from Contract with Customer (Details) - USD ($) $ in Millions		3 Months Ended				9 Months Ended
		Sep. 30, 2018		Sep. 30, 2017		Sep. 30, 2018		Sep. 30, 2017
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		$ 2,374		$ 2,233		$ 7,020		$ 6,487
Other Revenues	[1]	1,300		1,146		3,785		3,553
Total segment gross revenues		3,674		3,379		10,805		10,040
Less: Banking and deposit interest expense		26		13		64		36
Total segment net revenues before eliminations		3,648		3,366		10,741		10,004
Total net revenues		3,292		3,014		9,656		8,952
Intersegment revenues, eliminations [Member]
Disaggregation of Revenue [Line Items]
Eliminations		356		352		1,085		1,052
Total management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		1,571		1,476		4,598		4,215
Asset management fees - Retail [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		479		467		1,431		1,367
Asset management fees - Institutional [Member] [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		125		140		345		347
Advisory fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		740		641		2,137		1,817
Financial planning fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		75		71		223		210
Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		152		157		462		474
Total Distribution Fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		760		721		2,289		2,152
Mutual funds [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		246		254		757		791
Insurance and annuity [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		358		347		1,084		1,013
Other products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		156		120		448		348
Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		43		36		133		120
Total Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		2,374		2,233		7,020		6,487
Other Revenues	[1]	1,274		1,128		3,643		3,451
Total segment gross revenues		3,648		3,361		10,663		9,938
Less: Banking and deposit interest expense		26		13		64		36
Total segment net revenues before eliminations		3,622		3,348		10,599		9,902
Eliminations		354	[2]	348	[2]	1,073	[3]	1,040	[3]
Total net revenues		3,268		3,000		9,526		8,862
Total Segment [Member] | Total management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		1,571		1,476		4,598		4,215
Total Segment [Member] | Asset management fees - Retail [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		479		467		1,431		1,367
Total Segment [Member] | Asset management fees - Institutional [Member] [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		125		140		345		347
Total Segment [Member] | Advisory fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		740		641		2,137		1,817
Total Segment [Member] | Financial planning fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		75		71		223		210
Total Segment [Member] | Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		152		157		462		474
Total Segment [Member] | Total Distribution Fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		760		721		2,289		2,152
Total Segment [Member] | Mutual funds [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		246		254		757		791
Total Segment [Member] | Insurance and annuity [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		358		347		1,084		1,013
Total Segment [Member] | Other products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		156		120		448		348
Total Segment [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		43		36		133		120
Advice and Wealth Management [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		1,503		1,355		4,436		3,958
Other Revenues	[1]	85		67		232		183
Total segment gross revenues		1,588		1,422		4,668		4,141
Less: Banking and deposit interest expense		24		12		60		34
Total segment net revenues before eliminations		1,564		1,410		4,608		4,107
Total net revenues		1,329		1,177		3,886		3,406
Advice and Wealth Management [Member] | Intersegment revenues, eliminations [Member]
Disaggregation of Revenue [Line Items]
Eliminations		235		233		722		701
Advice and Wealth Management [Member] | Total management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		902		801		2,628		2,298
Advice and Wealth Management [Member] | Advisory fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		740		641		2,137		1,817
Advice and Wealth Management [Member] | Financial planning fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		75		71		223		210
Advice and Wealth Management [Member] | Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		87		89		268		271
Advice and Wealth Management [Member] | Total Distribution Fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		558		518		1,677		1,541
Advice and Wealth Management [Member] | Mutual funds [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		182		186		556		572
Advice and Wealth Management [Member] | Insurance and annuity [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		220		212		673		621
Advice and Wealth Management [Member] | Other products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		156		120		448		348
Advice and Wealth Management [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		43		36		131		119
Asset Management [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		760		769		2,254		2,214
Other Revenues	[1]	12		15		51		42
Total segment gross revenues		772		784		2,305		2,256
Total segment net revenues before eliminations		772		784		2,305		2,256
Total net revenues		759		772		2,268		2,221
Asset Management [Member] | Intersegment revenues, eliminations [Member]
Disaggregation of Revenue [Line Items]
Eliminations		13		12		37		35
Asset Management [Member] | Total management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		652		658		1,920		1,869
Asset Management [Member] | Asset management fees - Retail [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		479		467		1,431		1,367
Asset Management [Member] | Asset management fees - Institutional [Member] [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		125		140		345		347
Asset Management [Member] | Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		48		51		144		155
Asset Management [Member] | Total Distribution Fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		108		111		332		344
Asset Management [Member] | Mutual funds [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		64		68		201		219
Asset Management [Member] | Insurance and annuity [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		44		43		131		125
Asset Management [Member] | Other revenues [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers						2		1
Annuities [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		100		96		297		284
Other Revenues	[1]	528		530		1,566		1,577
Total segment gross revenues		628		626		1,863		1,861
Total segment net revenues before eliminations		628		626		1,863		1,861
Total net revenues		537		538		1,592		1,602
Annuities [Member] | Intersegment revenues, eliminations [Member]
Disaggregation of Revenue [Line Items]
Eliminations		91		88		271		259
Annuities [Member] | Total management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		15		14		44		42
Annuities [Member] | Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		15		14		44		42
Annuities [Member] | Total Distribution Fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		85		82		253		242
Annuities [Member] | Insurance and annuity [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		85		82		253		242
Protection [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		11		13		33		31
Other Revenues	[1]	600		465		1,630		1,485
Total segment gross revenues		611		478		1,663		1,516
Total segment net revenues before eliminations		611		478		1,663		1,516
Total net revenues		594		462		1,617		1,470
Protection [Member] | Intersegment revenues, eliminations [Member]
Disaggregation of Revenue [Line Items]
Eliminations		17		16		46		46
Protection [Member] | Total management and financial advice fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		2		3		6		6
Protection [Member] | Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		2		3		6		6
Protection [Member] | Total Distribution Fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		9		10		27		25
Protection [Member] | Insurance and annuity [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		9		10		27		25
Corporate and Other [Member]
Disaggregation of Revenue [Line Items]
Other Revenues	[1]	49		51		164		164
Total segment gross revenues		49		51		164		164
Less: Banking and deposit interest expense		2		1		4		2
Total segment net revenues before eliminations		47		50		160		162
Total net revenues		49		51		163		163
Corporate and Other [Member] | Intersegment revenues, eliminations [Member]
Disaggregation of Revenue [Line Items]
Eliminations		(2)		(1)		(3)		(1)
Non-operating Revenue [Member]
Disaggregation of Revenue [Line Items]
Other Revenues	[1]	26		18		142		102
Total segment gross revenues		26		18		142		102
Total segment net revenues before eliminations		26		18		142		102
Total net revenues		24		14		130		90
Non-operating Revenue [Member] | Intersegment revenues, eliminations [Member]
Disaggregation of Revenue [Line Items]
Eliminations		$ 2		$ 4		$ 12		$ 12

[1] Revenues not included in the scope of the revenue from contracts with customers standard. The amounts primarily consist of revenue associated with the manufacturing of insurance and annuity products or financial instruments.

[2] Represents the elimination of intersegment revenues recognized for the three months ended September 30, 2018 and 2017 in each segment as follows: Advice & Wealth Management ($235 million and $233 million, respectively); Asset Management ($13 million and $12 million, respectively); Annuities ($91 million and $88 million, respectively); Protection ($17 million and $16 million, respectively); and Corporate & Other ($(2) million and $(1) million, respectively).

[3] Represents the elimination of intersegment revenues recognized for the nine months ended September 30, 2018 and 2017 in each segment as follows: Advice & Wealth Management ($722 million and $701 million, respectively); Asset Management ($37 million and $35 million, respectively); Annuities ($271 million and $259 million, respectively); Protection ($46 million and $46 million, respectively); and Corporate & Other ($(3) million and $(1) million, respectively).