Basis of Presentation and Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2018

Accounting Policies [Abstract]

Revenue from non-insurance contracts with customers

Revenue from Non-Insurance Contracts with Customers

		Three months ended June 30,				Six months ended June 30,
	Revenue Line Item	2018		2017		2018		2017
Commercial Lines
Installment billing fees	Fee income	$	8	$	9	$	17	$	19
Personal Lines
Installment billing fees	Fee income	10		11		20		22
Insurance servicing revenues	Other revenues	23		23		42		42
Group Benefits
Administrative services	Fee income	44		19		88		38
Mutual Funds
Advisor, distribution and other management fees	Fee income	239		220		477		431
Other fees	Fee income	22		27		42		53
Corporate
Investment management and other fees	Fee income	4		—		6		1
Transition service revenues	Other revenues	2		—		2		—
Total revenues subject to updated guidance		$	352	$	309	$	694	$	606