Statements of Consolidated Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Net Income	$ 266.2		$ 260.5
Net unrealized (loss) gain on available-for-sale securities	0.3	[1]	(0.4)	[1]
Net unrealized gain on cash flow hedges	0.6	[2]	0.9	[2]
Unrecognized pension benefit and OPEB benefit	0.2	[3]	2.7	[3]
Total other comprehensive income	1.1		3.2
Total Comprehensive Income	$ 267.3		$ 263.7

[1] Net unrealized gain (loss) on available-for-sale securities, net of $0.2 million tax expense and $0.1 million tax benefit in the first quarter of 2014 and 2013, respectively

[2] Net unrealized gains on derivatives qualifying as cash flow hedges, net of $0.4 million and $0.6 million tax expense in the first quarter of 2014 and 2013, respectively

[3] Unrecognized pension benefit and OPEB benefit, net of zero and $1.7 million tax expense in the first quarter of 2014 and 2013, respectively