Goodwill and Other Intangibles (Changes in the Book Value of Goodwill by Segment) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Goodwill [Roll Forward]
Goodwill balance, Beginning of the year	$ 3,013	$ 863	$ 843
Acquisitions		2,150	22
Effect of foreign currency translation		0	(2)
Effect of foreign currency translation and other	22
Goodwill balance, End of the year	3,035	3,013	863
PGIM
Goodwill [Roll Forward]
Goodwill balance, Beginning of the year	254	233	235
Acquisitions		22	0
Effect of foreign currency translation		(1)	(2)
Effect of foreign currency translation and other	4
Goodwill balance, End of the year	258	254	233
Retirement
Goodwill [Roll Forward]
Goodwill balance, Beginning of the year	455	455	444
Acquisitions		0	11
Effect of foreign currency translation		0	0
Effect of foreign currency translation and other	0
Goodwill balance, End of the year	455	455	455
Assurance IQ
Goodwill [Roll Forward]
Goodwill balance, Beginning of the year	2,128	0	0
Acquisitions		2,128	0
Effect of foreign currency translation		0	0
Effect of foreign currency translation and other	12
Goodwill balance, End of the year	2,140	2,128	0
International Businesses
Goodwill [Roll Forward]
Goodwill balance, Beginning of the year	165	164	164
Acquisitions		0	0
Effect of foreign currency translation		1	0
Effect of foreign currency translation and other	(21)
Goodwill balance, End of the year	144	165	164
Other
Goodwill [Roll Forward]
Goodwill balance, Beginning of the year	11	11	0
Acquisitions		0	11
Effect of foreign currency translation		0	0
Effect of foreign currency translation and other	27
Goodwill balance, End of the year	$ 38	$ 11	$ 11