Selected Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2013

Quarterly Financial Information Disclosure [Abstract]

Selected quarterly financial data

(Millions of dollars)
2013	First quarter		Second quarter		Third quarter		Fourth quarter
Total revenues	$	680	$	695	$	699	$	711
Profit before income taxes	$	185	$	141	$	164	$	204
Profit	$	140	$	98	$	117	$	158
2012	First quarter		Second quarter		Third quarter		Fourth quarter
Total revenues	$	668	$	668	$	678	$	679
Profit before income taxes	$	173	$	135	$	160	$	116
Profit	$	122	$	98	$	114	$	94
2011	First quarter		Second quarter		Third quarter		Fourth quarter
Total revenues	$	640	$	675	$	668	$	662
Profit before income taxes	$	114	$	151	$	122	$	111
Profit	$	82	$	107	$	90	$	95