(in millions) | 2013 | 2012 | 2011 | ||||||
Valuation allowance at beginning of period | $ | 10,963 | $ | 10,705 | $ | 9,632 | |||
Income tax provision | (975 | ) | (432 | ) | (351 | ) | |||
Other comprehensive income tax benefit | (1,186 | ) | 690 | 1,241 | |||||
Release(1) | (8,310 | ) | — | — | |||||
Other | (315 | ) | — | 183 | |||||
Valuation allowance at end of period(2) | $ | 177 | $ | 10,963 | $ | 10,705 | |||
(1) | In addition to tax valuation allowance release of $8.3 billion, we recorded an income tax expense of $321 million related to an income tax allocation as discussed below, resulting in a net income tax benefit of $8.0 billion in 2013. |
(2) | At December 31, 2013, 2012 and 2011, $13 million, $3.1 billion and $2.5 billion of deferred income tax expense was recorded in AOCI on our Consolidated Balance Sheets, respectively. |