Long-Term Debt	6 Months Ended
Jun. 30, 2013
Long-term Debt, Unclassified [Abstract]
Long-Term Debt	Long-Term Debt In May 2013, we issued an aggregate of $1.50 billion of long-term debt, composed of $500 million of 1.35% senior notes due May 15, 2018 and $1.0 billion of 3.1% subordinated notes due May 15, 2023. Interest on the 1.35% senior notes and the 3.1% subordinated notes is payable semi-annually in arrears on May 15 and November 15 of each year, beginning on November 15, 2013. The 3.1% subordinated notes qualify for inclusion in tier 2 regulatory capital under federal regulatory capital guidelines.

Long-Term Debt

6 Months Ended

Jun. 30, 2013

Long-term Debt, Unclassified [Abstract]

In May 2013, we issued an aggregate of $1.50 billion of long-term debt, composed of $500 million of 1.35% senior notes due May 15, 2018 and $1.0 billion of 3.1% subordinated notes due May 15, 2023. Interest on the 1.35% senior notes and the 3.1% subordinated notes is payable semi-annually in arrears on May 15 and November 15 of each year, beginning on November 15, 2013. The 3.1% subordinated notes qualify for inclusion in tier 2 regulatory capital under federal regulatory capital guidelines.