Insurance Company Regulatory Requirements (Tables)

9 Months Ended

Sep. 30, 2018

Insurance Company Regulatory Requirements [Abstract]

Schedule of Statutory Dividends, Loans and Advances

Insurance Company Subsidiaries

	Third Quarter				Nine Months
	2018		2017		2018		2017
	(in millions)
Dividends paid by AGC to AGUS	$	15	$	15	$	91	$	66
Dividends paid by AGM to AGMH	58		63		131		142
Dividends paid by AG Re to AGL	18		45		98		125
Dividends paid by MAC to Municipal Assurance Holdings Inc. (MAC Holdings) (1)	12		12		27		36
Redemption of common stock by MAC from MAC Holdings (1)	—		250		—		250
Repurchase of common stock by AGC from AGUS	—		—		200		—

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(1) MAC Holdings distributed nearly the entire amounts to AGM and AGC, in proportion to their ownership percentages.